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. 2015 Sep 9;2(9):150173. doi: 10.1098/rsos.150173

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© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — (a) Probability distributions for $\tilde{β} (back)$ (Egypt, Thailand) and $\tilde{β} (comm)$ (others), (b) under reporting factor distributions for active and combined surveillance systems (both HPAI and LPAI) and passive (HPAI only) (central red line, median; box, approx. 25th/75th percentiles; whiskers, approx. first and 99th percentile), (c,d) global domestic chicken population densities, backyard and commercial production systems, respectively [14].